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Mechanical APDL Basic Analysis Guide - Ansys

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Chapter 9: Selecting and Components<br />

9.1.3. Selecting Lines to Repair CAD Geometry<br />

When CAD geometry is imported into ANSYS, the transfer may define the display of short line elements,<br />

which are difficult to identify on screen.<br />

By choosing the line selection option, you can find and display these short lines:<br />

Command(s): LSEL<br />

GUI: Utility Menu> Select> Entities> Lines> By Length/Radius<br />

Enter the minimum and maximum length or radius in the VMIN and VMAX fields. These fields, as they are<br />

used in this option, represent the range of values which corresponds to the length or radius of the short<br />

line elements. You should enter reasonable values in VMIN and VMAX to assure that the selected set only<br />

includes those short lines that you want to display. When the selected set appears on screen, you can pick<br />

individual lines within the set and repair the geometry as necessary.<br />

Note<br />

A line which is not an arc returns a zero radius. RADIUS is only valid for lines that are circular arcs.<br />

9.1.4. Other Commands for Selecting<br />

To restore all entities to their full sets, use one of the following:<br />

Command(s): ALLSEL<br />

GUI: Utility Menu> Select> Everything Below> Selected Areas<br />

Utility Menu> Select> Everything Below> Selected Elements<br />

Utility Menu> Select> Everything Below> Selected Lines<br />

Utility Menu> Select> Everything Below> Selected Keypoints<br />

Utility Menu> Select> Everything Below> Selected Volumes<br />

This one command has the same effect as issuing a series of NSEL,ALL; ESEL,ALL; KSEL,ALL; etc. commands.<br />

You also can use ALLSEL or its GUI equivalents to select a set of related entities in a hierarchical fashion.<br />

For example, given a subset of areas, you can select all lines defining those areas, all keypoints defining<br />

those lines, all elements belonging to these areas, lines, and keypoints, and all nodes belonging to these<br />

elements, by simply issuing one command: ALLSEL,BELOW,AREA<br />

To select a subset of degree of freedom and force labels, use one of the following:<br />

Command(s): DOFSEL<br />

GUI: Main Menu> Preprocessor> Loads> Define Loads> Operate> Scale FE Loads> Constraints<br />

Main Menu> Preprocessor> Loads> Define Loads> Operate> Scale FE Loads> Forces<br />

Main Menu> Preprocessor> Loads> Define Loads> Settings> Replace vs Add> Constraints<br />

Main Menu> Preprocessor> Loads> Define Loads> Settings> Replace vs Add> Forces<br />

Main Menu> Solution> Define Loads> Operate> Scale FE Loads> Constraints<br />

Main Menu> Solution> Define Loads> Operate> Scale FE Loads> Forces<br />

Main Menu> Solution> Define Loads> Settings> Replace vs Add> Constraints<br />

Main Menu> Solution> Define Loads> Settings> Replace vs Add> Forces<br />

By selecting a subset of these labels, you can simply use ALL in the Label field of some commands to refer<br />

to the entire subset. For instance, the command DOFSEL,S,UX,UZ followed by the command D,ALL,ALL<br />

212<br />

Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information<br />

of ANSYS, Inc. and its subsidiaries and affiliates.

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